Conics
n. 锥线法, 锥线论
🗣️ 情景例句
We tested it last week on twelve- to fifteen-year-olds,
我们上一周曾在十二岁至十五岁的孩子中试过这项游戏，
I used to start working at 9:00 o'clock every day.
我过去常在9:00点钟开始每天工作。
The ideal to be aimed at was to devise an instrument that could record with a pen on paper,
当地震发生时，它能用笔在纸上记录下